#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;
#define fir first
#define sec second
const int mxN=2020;
vector <int> v[mxN], g[mxN];
bool Chk[mxN];
bool used[mxN];
int sub[mxN];
int msub[mxN];
int f[mxN], invf[mxN];
bool cmp1(int a, int b)
{
return sub[a]>sub[b];
}
void dfs1(int now, int pre)
{
sub[now]=1;
msub[now]=-1;
for(int nxt : v[now])
{
if(Chk[nxt] || nxt==pre) continue;
dfs1(nxt, now);
sub[now]+=sub[nxt];
if(msub[now]==-1) msub[now]=nxt;
else if(sub[msub[now]]<sub[nxt]) msub[now]=nxt;
}
}
void Solve(int N) {
for(int i=0;i<N;i++) f[i]=i;
random_shuffle(f, f+N);
for(int i=0;i<N;i++) invf[f[i]]=i;
v[0].push_back(1);
v[1].push_back(0);
for(int i=2;i<N;i++)
{
if(used[i]) continue;
int root=1;
for(int j=0;j<N;j++) Chk[j]=false;
int cnt=0;
while(true)
{
cnt++;
dfs1(root, -1);
int cent=root;
while(msub[cent]!=-1 && sub[msub[cent]]*2>sub[root]) cent=msub[cent];
for(int nxt : v[cent])
{
if(Chk[nxt] || sub[nxt]<sub[cent]) continue;
sub[nxt]=sub[root]-sub[cent];
}
g[cent].clear();
for(int nxt : v[cent]) if(!Chk[nxt]) g[cent].push_back(nxt);
sort(g[cent].begin(), g[cent].end(), cmp1);
if(g[cent].empty())
{
v[cent].push_back(i);
v[i].push_back(cent);
break;
}
bool par=true;
bool flag=false;
for(int j=0;j<g[cent].size();j++)
{
int nxt=g[cent][j];
int res=invf[Query(f[cent], f[nxt], f[i])];
if(res!=cent)
{
par=false;
if(res==i)
{
//printf("s1");
for(int k=0;k<v[cent].size();k++)
{
if(v[cent][k]==nxt)
{
v[cent][k]=i;
break;
}
}
for(int k=0;k<v[nxt].size();k++)
{
if(v[nxt][k]==cent)
{
v[nxt][k]=i;
break;
}
}
v[i].push_back(cent);
v[i].push_back(nxt);
flag=true;
}
else if(res==nxt)
{
root=nxt;
Chk[cent]=true;
}
else
{
for(int k=0;k<v[cent].size();k++) {if(v[cent][k]==nxt) {v[cent][k]=res; break;}}
for(int k=0;k<v[nxt].size();k++) {if(v[nxt][k]==cent) {v[nxt][k]=res; break;}}
v[res].push_back(cent);
v[res].push_back(nxt);
v[i].push_back(res);
v[res].push_back(i);
used[res]=true;
flag=true;
}
break;
}
}
if(flag) break;
if(par)
{
v[cent].push_back(i);
v[i].push_back(cent);
break;
}
}
}
for(int i=0;i<N;i++)
{
for(int nxt : v[i])
{
if(f[nxt]>f[i]) Bridge(f[i], f[nxt]);
}
}
}
Compilation message
meetings.cpp: In function 'void Solve(int)':
meetings.cpp:64:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
64 | for(int j=0;j<g[cent].size();j++)
| ~^~~~~~~~~~~~~~~
meetings.cpp:74:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
74 | for(int k=0;k<v[cent].size();k++)
| ~^~~~~~~~~~~~~~~
meetings.cpp:82:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
82 | for(int k=0;k<v[nxt].size();k++)
| ~^~~~~~~~~~~~~~
meetings.cpp:101:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
101 | for(int k=0;k<v[cent].size();k++) {if(v[cent][k]==nxt) {v[cent][k]=res; break;}}
| ~^~~~~~~~~~~~~~~
meetings.cpp:102:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
102 | for(int k=0;k<v[nxt].size();k++) {if(v[nxt][k]==cent) {v[nxt][k]=res; break;}}
| ~^~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
432 KB |
Output is correct |
2 |
Correct |
1 ms |
456 KB |
Output is correct |
3 |
Correct |
1 ms |
456 KB |
Output is correct |
4 |
Correct |
1 ms |
456 KB |
Output is correct |
5 |
Correct |
1 ms |
456 KB |
Output is correct |
6 |
Correct |
1 ms |
456 KB |
Output is correct |
7 |
Correct |
1 ms |
456 KB |
Output is correct |
8 |
Correct |
1 ms |
456 KB |
Output is correct |
9 |
Correct |
1 ms |
444 KB |
Output is correct |
10 |
Correct |
1 ms |
512 KB |
Output is correct |
11 |
Correct |
1 ms |
456 KB |
Output is correct |
12 |
Correct |
1 ms |
456 KB |
Output is correct |
13 |
Correct |
1 ms |
456 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
432 KB |
Output is correct |
2 |
Correct |
1 ms |
456 KB |
Output is correct |
3 |
Correct |
1 ms |
456 KB |
Output is correct |
4 |
Correct |
1 ms |
456 KB |
Output is correct |
5 |
Correct |
1 ms |
456 KB |
Output is correct |
6 |
Correct |
1 ms |
456 KB |
Output is correct |
7 |
Correct |
1 ms |
456 KB |
Output is correct |
8 |
Correct |
1 ms |
456 KB |
Output is correct |
9 |
Correct |
1 ms |
444 KB |
Output is correct |
10 |
Correct |
1 ms |
512 KB |
Output is correct |
11 |
Correct |
1 ms |
456 KB |
Output is correct |
12 |
Correct |
1 ms |
456 KB |
Output is correct |
13 |
Correct |
1 ms |
456 KB |
Output is correct |
14 |
Correct |
1 ms |
456 KB |
Output is correct |
15 |
Correct |
1 ms |
456 KB |
Output is correct |
16 |
Correct |
1 ms |
456 KB |
Output is correct |
17 |
Correct |
1 ms |
456 KB |
Output is correct |
18 |
Correct |
1 ms |
456 KB |
Output is correct |
19 |
Correct |
1 ms |
456 KB |
Output is correct |
20 |
Correct |
1 ms |
456 KB |
Output is correct |
21 |
Correct |
1 ms |
456 KB |
Output is correct |
22 |
Correct |
1 ms |
456 KB |
Output is correct |
23 |
Correct |
1 ms |
456 KB |
Output is correct |
24 |
Correct |
1 ms |
456 KB |
Output is correct |
25 |
Correct |
1 ms |
456 KB |
Output is correct |
26 |
Correct |
2 ms |
456 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
432 KB |
Output is correct |
2 |
Correct |
1 ms |
456 KB |
Output is correct |
3 |
Correct |
1 ms |
456 KB |
Output is correct |
4 |
Correct |
1 ms |
456 KB |
Output is correct |
5 |
Correct |
1 ms |
456 KB |
Output is correct |
6 |
Correct |
1 ms |
456 KB |
Output is correct |
7 |
Correct |
1 ms |
456 KB |
Output is correct |
8 |
Correct |
1 ms |
456 KB |
Output is correct |
9 |
Correct |
1 ms |
444 KB |
Output is correct |
10 |
Correct |
1 ms |
512 KB |
Output is correct |
11 |
Correct |
1 ms |
456 KB |
Output is correct |
12 |
Correct |
1 ms |
456 KB |
Output is correct |
13 |
Correct |
1 ms |
456 KB |
Output is correct |
14 |
Correct |
1 ms |
456 KB |
Output is correct |
15 |
Correct |
1 ms |
456 KB |
Output is correct |
16 |
Correct |
1 ms |
456 KB |
Output is correct |
17 |
Correct |
1 ms |
456 KB |
Output is correct |
18 |
Correct |
1 ms |
456 KB |
Output is correct |
19 |
Correct |
1 ms |
456 KB |
Output is correct |
20 |
Correct |
1 ms |
456 KB |
Output is correct |
21 |
Correct |
1 ms |
456 KB |
Output is correct |
22 |
Correct |
1 ms |
456 KB |
Output is correct |
23 |
Correct |
1 ms |
456 KB |
Output is correct |
24 |
Correct |
1 ms |
456 KB |
Output is correct |
25 |
Correct |
1 ms |
456 KB |
Output is correct |
26 |
Correct |
2 ms |
456 KB |
Output is correct |
27 |
Correct |
8 ms |
456 KB |
Output is correct |
28 |
Correct |
8 ms |
484 KB |
Output is correct |
29 |
Correct |
9 ms |
456 KB |
Output is correct |
30 |
Correct |
8 ms |
492 KB |
Output is correct |
31 |
Correct |
9 ms |
456 KB |
Output is correct |
32 |
Correct |
11 ms |
456 KB |
Output is correct |
33 |
Correct |
17 ms |
456 KB |
Output is correct |
34 |
Correct |
21 ms |
496 KB |
Output is correct |
35 |
Correct |
20 ms |
588 KB |
Output is correct |
36 |
Correct |
10 ms |
456 KB |
Output is correct |
37 |
Correct |
13 ms |
504 KB |
Output is correct |
38 |
Correct |
12 ms |
504 KB |
Output is correct |
39 |
Correct |
11 ms |
636 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
659 ms |
744 KB |
Output is correct |
2 |
Correct |
693 ms |
676 KB |
Output is correct |
3 |
Correct |
770 ms |
848 KB |
Output is correct |
4 |
Correct |
613 ms |
800 KB |
Output is correct |
5 |
Correct |
634 ms |
688 KB |
Output is correct |
6 |
Correct |
589 ms |
676 KB |
Output is correct |
7 |
Correct |
887 ms |
800 KB |
Output is correct |
8 |
Correct |
1032 ms |
888 KB |
Output is correct |
9 |
Correct |
1090 ms |
724 KB |
Output is correct |
10 |
Correct |
966 ms |
732 KB |
Output is correct |
11 |
Correct |
1145 ms |
808 KB |
Output is correct |
12 |
Correct |
663 ms |
944 KB |
Output is correct |
13 |
Correct |
674 ms |
744 KB |
Output is correct |
14 |
Correct |
847 ms |
744 KB |
Output is correct |
15 |
Correct |
796 ms |
776 KB |
Output is correct |
16 |
Correct |
953 ms |
844 KB |
Output is correct |
17 |
Correct |
956 ms |
724 KB |
Output is correct |
18 |
Correct |
746 ms |
732 KB |
Output is correct |
19 |
Correct |
753 ms |
796 KB |
Output is correct |
20 |
Correct |
925 ms |
784 KB |
Output is correct |
21 |
Correct |
946 ms |
824 KB |
Output is correct |
22 |
Correct |
928 ms |
788 KB |
Output is correct |
23 |
Correct |
931 ms |
960 KB |
Output is correct |
24 |
Correct |
932 ms |
772 KB |
Output is correct |
25 |
Correct |
911 ms |
720 KB |
Output is correct |
26 |
Correct |
838 ms |
792 KB |
Output is correct |
27 |
Correct |
907 ms |
724 KB |
Output is correct |
28 |
Correct |
1153 ms |
704 KB |
Output is correct |
29 |
Correct |
878 ms |
768 KB |
Output is correct |
30 |
Correct |
950 ms |
712 KB |
Output is correct |
31 |
Correct |
1097 ms |
816 KB |
Output is correct |
32 |
Correct |
953 ms |
936 KB |
Output is correct |
33 |
Correct |
892 ms |
840 KB |
Output is correct |
34 |
Correct |
9 ms |
456 KB |
Output is correct |
35 |
Correct |
11 ms |
456 KB |
Output is correct |
36 |
Correct |
10 ms |
456 KB |
Output is correct |
37 |
Correct |
8 ms |
488 KB |
Output is correct |
38 |
Correct |
8 ms |
456 KB |
Output is correct |
39 |
Correct |
13 ms |
456 KB |
Output is correct |
40 |
Correct |
22 ms |
488 KB |
Output is correct |
41 |
Correct |
21 ms |
496 KB |
Output is correct |
42 |
Correct |
19 ms |
456 KB |
Output is correct |
43 |
Correct |
9 ms |
512 KB |
Output is correct |
44 |
Correct |
13 ms |
512 KB |
Output is correct |
45 |
Correct |
12 ms |
512 KB |
Output is correct |
46 |
Correct |
11 ms |
456 KB |
Output is correct |
47 |
Correct |
1 ms |
456 KB |
Output is correct |
48 |
Correct |
1 ms |
456 KB |
Output is correct |
49 |
Correct |
1 ms |
456 KB |
Output is correct |
50 |
Correct |
1 ms |
456 KB |
Output is correct |
51 |
Correct |
2 ms |
456 KB |
Output is correct |
52 |
Correct |
1 ms |
444 KB |
Output is correct |
53 |
Correct |
2 ms |
456 KB |
Output is correct |
54 |
Correct |
1 ms |
456 KB |
Output is correct |
55 |
Correct |
1 ms |
456 KB |
Output is correct |
56 |
Correct |
1 ms |
456 KB |
Output is correct |
57 |
Correct |
1 ms |
456 KB |
Output is correct |
58 |
Correct |
1 ms |
456 KB |
Output is correct |
59 |
Correct |
1 ms |
456 KB |
Output is correct |
60 |
Correct |
1 ms |
456 KB |
Output is correct |
61 |
Correct |
1 ms |
456 KB |
Output is correct |
62 |
Correct |
1 ms |
328 KB |
Output is correct |
63 |
Correct |
1 ms |
456 KB |
Output is correct |
64 |
Correct |
1 ms |
456 KB |
Output is correct |
65 |
Correct |
1 ms |
440 KB |
Output is correct |
66 |
Correct |
1 ms |
456 KB |
Output is correct |
67 |
Correct |
1 ms |
456 KB |
Output is correct |
68 |
Correct |
1 ms |
456 KB |
Output is correct |
69 |
Correct |
1 ms |
456 KB |
Output is correct |
70 |
Correct |
1 ms |
456 KB |
Output is correct |
71 |
Correct |
1 ms |
456 KB |
Output is correct |
72 |
Correct |
1 ms |
456 KB |
Output is correct |